Alcohol a Factor ...But Not for Charlie Sheen

12/26/2009 4:30 AM PST BY TMZ STAFF

Law enforcement sources tell TMZ ... Brooke Mueller was legally drunk when she called 911 on Charlie Sheen ... and, we've learned, Brooke has fessed up that her allegation was phony.

Sources say authorities gave both Charlie and Brooke blood alcohol tests. Brooke registered a .13 while Charlie registered a .04. By the way, the 911 call came in at 8:34 AM on Christmas day.

We're also told Brooke recanted her story to a female officer just before the bail hearing, telling the cop she was drunk when she made the 911 call. Nevertheless, law enforcement sources say police will still pursue the case -- at least for now.